Noninterlinking nut-lock washer



April 8,1930.

H. s. NORVVIOOD 1,753,313

NONINTERLINKING NUT LOCK WASHER un all; 3 5 8 4 Filed May- 8, '1928 1m mm FIG. 4

gvwentoz HARRY 6. IVO/PWO0D Patented Apr. 8, 1930 UNITED STATES WASHER COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY I NONINTERLINKING NUT-1290K WASHER 1 Application filed May 8,1928. Serial no. 276,058.

This invention relates to means for pre venting spring nut lock washers from interlinking when they are thrown together in bulk when handling and shipping. l Vhere washers of this kind become interlinked, as they do in practice, during shipment, much time is consumed by the workmen in separating the washers so that they may beused. In certain factories, for example in the automotive industry, where these kinds of Wash-' ers are used in tremendous quantity, the time involved in separating the ordinary split lock washers, means a great loss in money.

It is therefore the principal object of my improved form of washer.

' Figure 2 is a side elevation of Figure 1.

Figure 8 is like Figure'2, but of a modified form. 1

Figure 4 is a sectional view taken on the line 44 of Figure 1.

Referring now to the details in which like numbers refer to corresponding parts in the different views noted:

1 is the body of the washer which is split at 2. As shown in Figure 2,'the ends3 and 4 of the washer adjacent the split2, are formed by bending or offsetting the entire body of metal so as to provide projections 7 and 8 which extend in opposite directions topoints where they overlap or intercept the circumferential opening between these ends. Were the ends 3 and 4: without the projections 7 and 8, another washer of the same kind, would slip by this circumferential opening and the washers would interlink,assuming of I course that the pitch of the spiral of the washer is within certain limits. The projections 7 and 8 prevent this actionfrom taking place.

locking effect.

" At'the same time, the points 5 and 6 act to grip into the material as the nut is tightened down, thereby giving the usual look similar to,

HARRY e. NORWOOD, or BALTIMORE, MARYLAND, ASSIGNOR T0 Tim rosrcurvn LOCK that shown in Trumbull Patent 440,870, is-

sued November 18, 1890. If in'certain sizes of washers, the pressure'of'the nut isv sufficient to embed, the points 5and 6 into' the material suficiently to'allow'the projections 7 and 8 to come into the same planes as the points 6 and 5 respectively, there might be then some tendency for the nut engaging an extreme corner of the projections 7 or 8to spread the washer. In such cases, Iprefer to slightly round the corners of the projections 7 and 8 so as to allow the nut to ride over them without spreading the washer. Even though these corners'b'e slightly rounded as, indicated,

an increased efficiency in the locking fea-' ture of the washer is obtained. The same thing applies to the other forms of washers In Figure 3, thesame advantages as shown in Figure 2 are obtained, but the ends 3 and 4: of the washer are shown slightly tapered to.

allow these ends to function to give a little will be seen that the stock of the washer is cut straight across its width, or substantially on one of its diameters, and that the split ends of the washer maybe displaced sufficiently to provide armaximum' spring efiect, while at the same time obtaining the non-interlinking feature and furthermore securing a greater I Having thus described my invention, what Iclaim is: r V 1. In a spring: nut lock washer having a transverse split and the ends adjacent the split offset a predetermined amount in opposite directions to give the spring efiect, means for. preventing the washers when thrown together in bulk from interlinking, comprising;

a bend in the whole body of thestock at each end adjacent the split and'extending in a direction opposite to that of the offset so that the ends overlap or intercept the opening be tween the endsof said oil'set portions for the purpose described.

2. In a spring lock washer having the stock out acrossits width substantially on a radius of the washer and the cut ends ofiset a predetermined amount to give the spring effect, means for obtaining an increased gripping action and for preventing the washers, when thrown together in bulk, from interlinking comprising a formation at each cut end of the washer, said formation consisting of a bend in the entire body of the stock, the bend being a short distance from the cut, whereby there is formed a gripping spur substantially opposite the line of each'bend, and a gripping edge at the opposite corners of the cut adjacent the line of each bend, no part of said gripping edges extending beyond a plane through and parallel to the cut, and including a diameter of the Washer, but acting to intercept the opening between said ends.

, 3. In a spring lock washer having a transverse split along a diameter of the washer and the ends, adj acentthe split, offset a predetermined amount in opposite directions to give the spring efi'ect, said ends being tapered and ending in enlarged portions which are bent bodily at the end of the taper in a direction opposite to that of the offset so that the ends overlap or intercept the opening between the ends of said ofi'set portions, each of said enlarged portions having gripping edges on opposite sides of the washer.

In testimony whereof, I afiix my signature.

HARRY G. NORWOOD. 

